mbt shoes ireland Ways to reduce the spread of har

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Ways to reduce the spread of harmful gases


Some gas and dust, the dust has passed the electrostatic precipitator, bag filter, cyclone and other dust removal device has been initially controlled, HF, SO and NOx has become the primary pollutant. Now on some of the commonly used approach to do some introduction: 1 roasting process measures have fluoride in the process of roasting cycle: in the 500 ~ 800 ℃ when the clay in the cyanide fluoride to fluoride (HF) gas released in the form with the flue gas mixed by preheating zone, the part of the reaction of limestone with clay in the brick body to generate calcium fluoride (CaF), while the rest are run away with the chimney flue. Calcium fluoride in the fluoride than the clay better high temperature performance. Brick body of calcium fluoride with arrival after roasting, part of the decomposition of the fluorine gas has run away. HF soluble in water, water vapor a great influence on the decomposition of calcium fluoride. The higher the water vapor content of the kiln atmosphere, the amount of fluoride released from the decomposition of the greater. So. Most importantly, as far as possible into the brick kiln drying. Of course. Fuel vapor generated in the chemical combination of clay and water from the water vapor formed is also extremely important. In addition. Calcium fluoride release of fluoride also depends on the time and temperature. By shortening the baking band at about 800 ℃ and above to speed up the heating rate. Will help to reduce the fluoride ion diffusion. Coal gangue brick. The sulfur content, there are four forms: pyritic sulfur,mbt shoes ireland, sulfate sulfur, organic sulfur and sulfur; which elemental sulfur, organic sulfur and pyrite sulfur combustion emit SO, and sulfate can not burn and become ash part. Oxygen sufficient conditions, 300 ~ 600 ℃, the pyrite began to emit SO a SO, gases,tory burch outlet, such as heating up too fast, so that products skin burst, similar to the burst of lime produced, and at 900 ℃ high temperature gas generated in the bricks sulfate and stable; Therefore, in the preheating zone to control the oxygen content in the firing zone should have sufficient oxygen to fully oxidized completely decomposed to produce sulfate. 2 raw materials plus add lime can promote calcium sulfate, calcium sulfite and calcium fluoride to form, thus effectively reducing the spread of harmful gases. Gangue clay or limestone on the poor, particularly the role of adding lime. The lime-rich clay or gangue, by contrast, because the materials in the limestone content is sufficient to generate calcium. In the limestone-rich raw materials, by adding lime can increase the porosity of the brick body. Lead to increased spread of harmful gases. No. 6, 2005 by adding the powder could inhibit the escape of harmful gases. Provided that the powder can affect the tile surface, thereby preventing the escape of harmful gases from the brick,p90x workout schedule, but the sintered powder is more expensive, so most of the brick is not used. The most effective way is through the purification of flue gas to reduce harmful gas pollution. SO 3 flue gas purification of the flue gas purification methods are more absorbent and used by the adsorbent and forms processing into two major categories of dry and wet. Dry flue gas desulfurization methods are mainly activated carbon method, lime powder blown into the law and the manganese oxide method. Wet FGD is flue gas in the liquid absorbent to absorb the SO, with less investment, operation and management is easy, fast response, high efficiency desulfurization. (1) by adding lime dry flue gas adsorption, it is the lime powder is injected into the flue gas to form a gas-solid mixture, then the solid lime inhalation of harmful gaseous fluoride (HF) and sulfur (SO and SO,) and insoluble and harmless compounds, namely calcium fluoride (CaF), calcium sulfite (CaSO,) and calcium sulfate (CaSO) so named after the dry adsorption. This compound as a powder and exhaust emissions. In order to achieve full absorption. The following are particularly important: ① by the reaction as long as possible: ② even to the amount of lime and flue gas flow in good trip turbulence, to provide adequate reaction conditions; ③ use gray surface area as large as possible a number of compounds; ④ gas temperature as low as possible. (2) is a lime slurry is wet desulfurization adsorbent, the flue gas through the water into the limestone to form a gas-liquid mixture, the gas with calcium hydroxide to reflect. The resulting calcium sulfate precipitation. Take two measures to address here. ① increase the concentration of lime slurry to improve the liquid adsorption; such as poor mobility, ash and calcium sulfate can be added to improve the slurry flow. ② to improve flue gas inlet temperature to evaporate the excess of lime slurry into the water, while adding CaC1, NaOH,ghd planchas, etc., to improve the slurry of water will not evaporate too quickly, thereby enhancing the desulfurization efficiency. (3) In addition to sulfur compound removal device integration, in addition to sulfur compound removal device can be integrated in the flue gas to remove impurities such as dust and sulfur dioxide, which has a higher efficiency of dust removal and desulfurization, the current complex integration of desulphurization dust unit leader, should be vigorously promoted.
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